Basically, the frightfulness of Kolyma was due not to geographical or climatic reasons, but to conscious decisions taken in Moscow. For a few years before 1937, in fact, it was well administered and the death rate was low. The climate, though exceedingly cold, is a remarkably healthy one for men who are properly fed, clothed and sheltered. In this earlier phase, the main aim of the administration was to produce gold efficiently. In the later period ( as one commandant put it quite openly), though the gold remained important, the central aim was to kill off the prisoners. In the earliest period of the labour camp system, the Solovki camps on the islands of the White Sea were the symbol of the whole system, the worst killers. These were followed, in the mid-thirties, by the camps of the Baltic-White Sea Canal. Kolyma took their place just when the system was reaching its maximum expansion, and remained central to it for the next fifteen years, as (in Solzhenitsyn's words) 'the pole of cold and cruelty' of the labour camp system."